F04B 43/009
Leakage control
Official title: {leakage control; pump systems with two flexible members; between the actuating element and the pumped fluid}
F04B43/009 (Leakage control) appears on 122 US grants and 80 published applications in this corpus.
Search patents in F04B- Granted patents
- 122
- Published applications
- 80
- Assignees
- 88
- Inventors
- 248
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 0 |
| 2004 | 4 | 7 |
| 2005 | 4 | 4 |
| 2006 | 3 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 0 | 2 |
| 2014 | 2 | 5 |
| 2015 | 0 | 2 |
| 2016 | 4 | 3 |
| 2017 | 2 | 5 |
| 2018 | 3 | 6 |
| 2019 | 7 | 4 |
| 2020 | 4 | 5 |
| 2021 | 5 | 8 |
| 2022 | 5 | 8 |
| 2023 | 7 | 4 |
| 2024 | 4 | 6 |
| 2025 | 5 | 3 |
| 2026 | 6 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bellows failure detection for a pump1 Sep 2026US 12,723,580 B2Halliburton Energy Services.Inc.
- Diaphragm rupture signalling device28 Jul 2026US 12,692,855 B2ProMinent GmbH
- Diaphragm and chemical flow control device16 Jun 2026US 12,655,834 B2Ckd Corporation
- Protection of make-up system for high pressure bellows-style pump system28 Apr 2026US 12,612,909 B2Halliburton Energy Services.Inc.
- Diaphragm pump14 Apr 2026US 12,601,340 B2Cytiva Sweden AB
- Diaphragm Pump23 Jul 2026US 2026/0210347 A1Cytiva Sweden AB
- Diaphragm Pump18 Sep 2025US 2025/0290499 A1Tacmina Corporation
- Diaphragm rupture signalling device29 May 2025US 2025/0172136 A1ProMinent GmbH
- Leak detection and containment muffler system9 Jan 2025US 2025/0012657 A1Psg California LLC
- Piston diaphragm pump12 Dec 2024US 2024/0410351 A1Feluwa Pumpen GmbH
Most cited
By later US patents
- Apparatus and method for detection of a leak in a membrane of a fluid flow control system290US 6,223,130 B1DEKA Products Limited Partnership · 2001
- Pump assembly228US 3,966,358 AMedac Gesellschaft FüR Klinische SpezialpräParate Mbh · 1976
- Blood component processing systems and methods using fluid-actuated pumping elements that are integrity tested prior to use120US 6,846,161 B2Baxter International Inc. · 2005
- Modular double-diaphragm pump106US 5,332,372 AWarren Rupp, Inc. · 1994
- Diaphragm pump with at least two diaphragms104US 5,554,014 AKNF Neuberger GmbH · 1996